Tom, given the wild card nature of this residence and lot, it cannot and did not garner anywhere near what a total home and lot would cost to construct. Although I can afford a 45' coach, I'm perfectly suited for my 24' E450 7.3 Powerstroke diesel unit. I'd have a lot of extra SF in the main coach garage. There's space for four more cars further down the drive at the other end of the home. The garages take up nearly 50% of the 1st floor's square footage. 4,956 total SF in the home.
BTW, I've owned a home over 30 consecutive years now. Home ownership isn't a new thing for me.